*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

html,body{
    height: 100vh;
}

header{
    padding-left: 120px;
    padding-right: 120px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    background-color:#8BC6EC;
    background-image: linear-gradient(135deg, #8BC6EC 0%, #9599E2 100%);
    color: white;
}

header a{
    text-decoration: none;
    color: white;
}
/* 鼠标移动上来的效果 */
header a:hover{
    color: rgba(255, 255, 255, 0.6);
}

main{
    margin-top: 10px;
    margin-left: 120px;
    margin-right: 120px;
}

ol{
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}

li{
    width: 210px;
    height: 360px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
}

li img{
    width: 210px;
    height: 280px;
    object-fit: cover;
}